- ‘F’ Class 2-8-0 Locomotive class
- From 1906 ten class ‘B’ goods engines were modified to have a leading pony truck the same as class ‘E’, but were also fitted with larger 5ft 2in diameter boilers. From 1911 these engines became known as class ‘F’. In addition, two class ‘E’ engines also received the larger boiler and thus brought the number of class ‘F’ engines up to twelve.
- ‘G’ 0-8-0 Locomotive Class
- Mr Whale converted ‘B’ class four-cylinder compounds into ‘G’ class two-cylinder simple engines, retaining the ‘B’ class’s inside frame low-pressure cylinders. As these cylinders were 1in larger in diameter he reduced the boiler pressure to 160 psi so the tractive effort would be about the same. The distinctively shaped covers below the smoke box were retained even though they had nothing to cover. These covers lead to the nickname ‘piano front Gs’.
- ‘G1’ 0-8-0 Locomotive Class
- Super heated 0-8-0, some built new, but 279 rebuilt from classes ‘A’ to ‘G’. The main external difference compared with a ‘G’ class is the longer smoke box, to accommodate the super heater header, though the barrel length of both boilers was the same at 14ft 10in; internally inside-admission piston valves replaced the ‘G’ class slide valves, though the cylinders were the same size. They were originally fitted with super heater dampers, they were soon found to be unnecessary and so removed. At some stage, possibly after first World War, steam heating was added also, not so much for passenger trains, as for working banana specials from Garston Docks. Some 25 specials might be run at short notice when Fyffe’s steamer came in.
- ‘G2’ 0-8-0 Locomotive Class
- In 1921-2 sixty class ‘G2’ 0-8-0s were built. They were a development of the ‘G1’ class with higher boiler pressure, 175 psi (compared with 160 psi). The ‘G2s’ were the only LNWR 0-8-0s which were never rebuilt to some other class, and none were ever painted in lined livery.
- ‘G2A’ 0-8-0 Locomotive Class
- October 1935 ‘G1’ class converted like ‘G2’ class, with higher boiler pressure, stronger motion and increased brake power.
- George the Fifth 4-4-0 Locomotive Class
- A class of 4-4-0 locomotives built by Bowen Cooke from 1910, a superheated development of Whale’s “Precursor” class, and named after the first of the class. Initially “Queen Mary” (the second in the class), was built without superheating, for comparative trials with its sibling. Following the trials later members of the class were built superheated and “Queen Mary” was also converted. Engines of the class probably performed more prodigious feats of hauling heavy trains at high speeds than any other 4-4-0.
- Greater Britain 2-2-2-2 Locomotive Class
- This class of ten 2-2-2-2 compounds was built by Webb from 1891 to 1894. With 7ft driving wheels and the same cylinder arrangement and valve gear as the “Teutonics”, they were a massive development of that class. Their overall length, at just over 54ft, was comparable with that of the eight-coupled goods engines. All had two-word names; each word on its own name plate on each splasher.